A bis(ferrocenyl)phenanthroline iridium(III) complex as a lab-on-a-molecule for cyanide and fluoride in aqueous solution

Qinghai Shu; Lars Birlenbach; Michael Schmittel

doi:10.1021/ic301256g

A bis(ferrocenyl)phenanthroline iridium(III) complex as a lab-on-a-molecule for cyanide and fluoride in aqueous solution

Qinghai Shu, Lars Birlenbach, Michael Schmittel^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

73 Citations (Scopus)

Abstract

The bis(ferrocenyl)phenanthroline iridium(III) complex 1 is synthesized and elaborated as a lab-on-a-molecule for the competitive and quantitative determination of cyanide and fluoride in aqueous solution. 1 exhibits a strong OFF-ON photoluminescence (PL) response upon addition of cyanide with a good selectivity over other anions. The mechanism involves nucleophilic displacement of the phenanthroline ligand, which quenches PL, to furnish a strongly photoluminescent dicyano iridium complex. In contrast, in the electrochemiluminescence (ECL) channel, cyanide undergoes oxidation and a different selectivity is observed. The strong ferrocenium-fluoride interaction is exploited for the first time in ECL to selectively monitor fluoride by a >60-fold enhancement. In both PL and ECL channels, anion selectivity is further challenged by competitive assays in the presence of other anions. Quantitative determination of CN^- and F^- is achieved in both channels.

Original language	English
Pages (from-to)	13123-13127
Number of pages	5
Journal	Inorganic Chemistry
Volume	51
Issue number	24
DOIs	https://doi.org/10.1021/ic301256g
Publication status	Published - 17 Dec 2012
Externally published	Yes

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title = "A bis(ferrocenyl)phenanthroline iridium(III) complex as a lab-on-a-molecule for cyanide and fluoride in aqueous solution",

abstract = "The bis(ferrocenyl)phenanthroline iridium(III) complex 1 is synthesized and elaborated as a lab-on-a-molecule for the competitive and quantitative determination of cyanide and fluoride in aqueous solution. 1 exhibits a strong OFF-ON photoluminescence (PL) response upon addition of cyanide with a good selectivity over other anions. The mechanism involves nucleophilic displacement of the phenanthroline ligand, which quenches PL, to furnish a strongly photoluminescent dicyano iridium complex. In contrast, in the electrochemiluminescence (ECL) channel, cyanide undergoes oxidation and a different selectivity is observed. The strong ferrocenium-fluoride interaction is exploited for the first time in ECL to selectively monitor fluoride by a >60-fold enhancement. In both PL and ECL channels, anion selectivity is further challenged by competitive assays in the presence of other anions. Quantitative determination of CN- and F- is achieved in both channels.",

author = "Qinghai Shu and Lars Birlenbach and Michael Schmittel",

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doi = "10.1021/ic301256g",

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journal = "Inorganic Chemistry",

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T1 - A bis(ferrocenyl)phenanthroline iridium(III) complex as a lab-on-a-molecule for cyanide and fluoride in aqueous solution

AU - Shu, Qinghai

AU - Birlenbach, Lars

AU - Schmittel, Michael

PY - 2012/12/17

Y1 - 2012/12/17

N2 - The bis(ferrocenyl)phenanthroline iridium(III) complex 1 is synthesized and elaborated as a lab-on-a-molecule for the competitive and quantitative determination of cyanide and fluoride in aqueous solution. 1 exhibits a strong OFF-ON photoluminescence (PL) response upon addition of cyanide with a good selectivity over other anions. The mechanism involves nucleophilic displacement of the phenanthroline ligand, which quenches PL, to furnish a strongly photoluminescent dicyano iridium complex. In contrast, in the electrochemiluminescence (ECL) channel, cyanide undergoes oxidation and a different selectivity is observed. The strong ferrocenium-fluoride interaction is exploited for the first time in ECL to selectively monitor fluoride by a >60-fold enhancement. In both PL and ECL channels, anion selectivity is further challenged by competitive assays in the presence of other anions. Quantitative determination of CN- and F- is achieved in both channels.

AB - The bis(ferrocenyl)phenanthroline iridium(III) complex 1 is synthesized and elaborated as a lab-on-a-molecule for the competitive and quantitative determination of cyanide and fluoride in aqueous solution. 1 exhibits a strong OFF-ON photoluminescence (PL) response upon addition of cyanide with a good selectivity over other anions. The mechanism involves nucleophilic displacement of the phenanthroline ligand, which quenches PL, to furnish a strongly photoluminescent dicyano iridium complex. In contrast, in the electrochemiluminescence (ECL) channel, cyanide undergoes oxidation and a different selectivity is observed. The strong ferrocenium-fluoride interaction is exploited for the first time in ECL to selectively monitor fluoride by a >60-fold enhancement. In both PL and ECL channels, anion selectivity is further challenged by competitive assays in the presence of other anions. Quantitative determination of CN- and F- is achieved in both channels.

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JO - Inorganic Chemistry

JF - Inorganic Chemistry

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ER -

A bis(ferrocenyl)phenanthroline iridium(III) complex as a lab-on-a-molecule for cyanide and fluoride in aqueous solution

Abstract

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